CVE-2021-30807

Apple's IOMobileFrameBuffer memory corruption flaw allowed kernel privilege escalation via user-space apps.

A memory corruption bug in Apple's IOMobileFrameBuffer component across iOS, iPadOS, macOS, and watchOS permitted malicious applications to execute code with kernel privileges. This failure is critical for DIB organizations because it represents a severe, avoidable exposure where user-space applications could compromise the entire operating system kernel, violating the principle of least privilege and enabling lateral movement or data exfiltration. Organizations must ensure all Apple endpoints are patched immediately and monitor for exploitation attempts, as this vulnerability was actively exploited in the wild.

Shame score — A memory corruption vulnerability allowing kernel privilege escalation from user-space applications is a severe, avoidable flaw that was actively exploited in the wild, demonstrating a critical failure in Apple's secure coding and patching practices.